package com.mdroid.support.widgets.text;

import android.text.Layout;
import android.text.Spannable;
import android.text.method.LinkMovementMethod;
import android.text.method.MovementMethod;
import android.text.style.ClickableSpan;
import android.view.MotionEvent;
import android.widget.TextView;

/**
 * 去除TextView中链接的下划线
 * @author William.cheng
 * @version 创建时间：2011-12-26 上午10:30:05
 */
public class LinkMethod extends LinkMovementMethod {

    @Override
    public boolean onTouchEvent(TextView widget, Spannable buffer,
            MotionEvent event) {
        int action = event.getAction();

        if (action == MotionEvent.ACTION_UP
                || action == MotionEvent.ACTION_DOWN) {
            int x = (int) event.getX();
            int y = (int) event.getY();

            x -= widget.getTotalPaddingLeft();
            y -= widget.getTotalPaddingTop();

            x += widget.getScrollX();
            y += widget.getScrollY();

            Layout layout = widget.getLayout();
            int line = layout.getLineForVertical(y);
            int off = layout.getOffsetForHorizontal(line, x);

            ClickableSpan[] link = buffer.getSpans(off, off,
                    ClickableSpan.class);

            if (link.length != 0) {
                if (action == MotionEvent.ACTION_UP) {
                    link[0].onClick(widget);
                } else if (action == MotionEvent.ACTION_DOWN) {
                    // Selection.setSelection(buffer,
                    // buffer.getSpanStart(link[0]),
                    // buffer.getSpanEnd(link[0]));
                }

                return true;
            } else {
                // Selection.removeSelection(buffer);
            }
        }

        return super.onTouchEvent(widget, buffer, event);
    }
    private static LinkMovementMethod sInstance;
    public static MovementMethod getInstance() {
        if (sInstance == null)
            sInstance = new LinkMethod();

        return sInstance;
    }
}
